【High-quality material】: The Air Filter Silencer is made of high-quality plastic and metal materials, which is durable and prolongs its service life. 【Package list】: You will receive 4 Air Compressor Silencer Filters, the thread diameter is about 20mm, not easy to damage. 【Noise reduction】: The 20mm Air Compressor Filter can effectively prevent dust inhalation and reduce noise during work. 【Easy to use】: The Air Compressor Silencer Filter is an ideal accessory for air compressors. It is easy to use and just needs to be screwed into the device. 【Scope of application】: The Compressor Air Filter is suitable for oil-free air compressors and can also be used for generators, water pumps, blowers, etc.